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参数资料
| 型号： | SN74ABT18502PMR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | ABT SERIES, DUAL 9-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PQFP64 |
| 封装： | GREEN, PLASTIC, LQFP-64 |
| 文件页数： | 3/32页 |
| 文件大小： | 578K |
| 代理商： | SN74ABT18502PMR |
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SN74ABT18502
SCAN TEST DEVICE
WITH 18-BIT REGISTERED BUS TRANSCEIVER
SCBS753 – FEBRUARY 2002
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Table 3. Device IDR Configuration
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
31
VERSION3
27
PARTNUMBER15
11
MANUFACTURER10
30
VERSION2
26
PARTNUMBER14
10
MANUFACTURER09
29
VERSION1
25
PARTNUMBER13
9
MANUFACTURER08
28
VERSION0
24
PARTNUMBER12
8
MANUFACTURER07
––
23
PARTNUMBER11
7
MANUFACTURER06
––
22
PARTNUMBER10
6
MANUFACTURER05
––
21
PARTNUMBER09
5
MANUFACTURER04
––
20
PARTNUMBER08
4
MANUFACTURER03
––
19
PARTNUMBER07
3
MANUFACTURER02
––
18
PARTNUMBER06
2
MANUFACTURER01
––
17
PARTNUMBER05
1
MANUFACTURER00
––
16
PARTNUMBER04
0
LOGIC1
––
15
PARTNUMBER03
––
14
PARTNUMBER02
––
13
PARTNUMBER01
––
12
PARTNUMBER00
––
Note that for TI products, bits 11– 0 of the device IDR always contains the binary value 000000101111 (02F, hex).
instruction-register (IR) opcode
The IR opcodes are shown in Table 4. The following descriptions detail the operation of each instruction.
Table 4. IR Opcodes
BINARY CODE
BIT 7
→ BIT 0
MSB
→ LSB
SCOPE OPCODE
DESCRIPTION
SELECTED DR
MODE
00000000
EXTEST
Boundary scan
Test
10000001
IDCODE
Identification read
Device identification
Normal
10000010
SAMPLE/PRELOAD
Sample boundary
Boundary scan
Normal
00000011
INTEST
Boundary scan
Test
10000100
BYPASS§
Bypass scan
Bypass
Normal
00000101
BYPASS§
Bypass scan
Bypass
Normal
00000110
HIGHZ
Control boundary to high impedance
Bypass
Modified test
10000111
CLAMP
Control boundary to 1/0
Bypass
Test
10001000
BYPASS§
Bypass scan
Bypass
Normal
00001001
RUNT
Boundary run test
Bypass
Test
00001010
READBN
Boundary read
Boundary scan
Normal
10001011
READBT
Boundary read
Boundary scan
Test
00001100
CELLTST
Boundary self test
Boundary scan
Normal
10001101
TOPHIP
Boundary toggle outputs
Bypass
Test
10001110
SCANCN
BCR scan
Boundary control
Normal
00001111
SCANCT
BCR scan
Boundary control
Test
All others
BYPASS
Bypass scan
Bypass
Normal
Bit 7 is used to maintain even parity in the 8-bit instruction.
§ The BYPASS instruction is executed in lieu of a SCOPE instruction that is not supported in the SN74ABT18502.
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相关代理商/技术参数 |
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| SN74ABT18502PMRG4 | 功能描述:特定功能逻辑 W/18-Bit Univ Bus Trncvr RoHS:否 制造商:Texas Instruments 产品: 系列:SN74ABTH18502A 工作电源电压:5 V 封装 / 箱体:LQFP-64 封装:Tube |
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| SN74ABT18504PM | 功能描述:特定功能逻辑 Device w/20-Bit Univ Bus Transceiver RoHS:否 制造商:Texas Instruments 产品: 系列:SN74ABTH18502A 工作电源电压:5 V 封装 / 箱体:LQFP-64 封装:Tube |
| SN74ABT18504PMG4 | 功能描述:特定功能逻辑 Device w/20-Bit Univ Bus Transceiver RoHS:否 制造商:Texas Instruments 产品: 系列:SN74ABTH18502A 工作电源电压:5 V 封装 / 箱体:LQFP-64 封装:Tube |
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